# Is grunt-contrib-concat ESM-only? Can you require() it?

> grunt-contrib-concat@2.1.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Concatenate files.

Last verified Sep 9, 2026 against grunt-contrib-concat@2.1.0.

grunt-contrib-concat ships CommonJS only. require("grunt-contrib-concat") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.12.0. import "grunt-contrib-concat" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

## What to do

1. require("grunt-contrib-concat") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.12.0.
2. From ES modules use the default import: import gruntContribConcat from "grunt-contrib-concat"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for grunt-contrib-concat; declare the module yourself if you need them.

## Facts

- Latest: 2.1.0 (Apr 3, 2022)
- Module format: CommonJS
- Last CommonJS version: 2.1.0
- TypeScript types: none
- Node engines: >=0.12.0
- Weekly downloads: 329K
- License: MIT

## Runtime test results for grunt-contrib-concat@2.1.0

Installed and executed on Sep 9, 2026 with require("grunt-contrib-concat") from a CommonJS file and import "grunt-contrib-concat" from an ES module.

| Runtime | require("grunt-contrib-concat") | import "grunt-contrib-concat" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import grunt-contrib-concat

ES modules:

```js
import gruntContribConcat from "grunt-contrib-concat";
```

CommonJS:

```js
const gruntContribConcat = require("grunt-contrib-concat");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (13 versions; the newest 13 shown).

| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 2.1.0 | CommonJS | Oct 5, 2012 |

## Frequently asked

**Is grunt-contrib-concat ESM-only?**

grunt-contrib-concat@2.1.0 is a CommonJS package. grunt-contrib-concat ships CommonJS only. require("grunt-contrib-concat") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.12.0. import "grunt-contrib-concat" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

**Can I import grunt-contrib-concat with ES module syntax?**

Yes. import gruntContribConcat from "grunt-contrib-concat" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does grunt-contrib-concat work in Bun?**

Yes. import "grunt-contrib-concat" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does grunt-contrib-concat ship TypeScript types?**

No. grunt-contrib-concat ships no type declarations and there is no @types package for it.

## Links

- [grunt-contrib-concat on npm](https://www.npmjs.com/package/grunt-contrib-concat)
- [Source repository](https://github.com/gruntjs/grunt-contrib-concat)
- [HTML version](https://canirequire.com/package/grunt-contrib-concat/)
- [JSON version](https://canirequire.com/package/grunt-contrib-concat.json)

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